It offers no value to users.
This is demonstrably false. You can say that pseudonymity has great value. You can say that to you, it has vastly more value than "real names". However, to say that real names offer to value to users, whose goal is to connect primarily with people they know in real life, is either ignorant or defiantly stupid.
what's worse is that with the "circles" bs, google builds a profile of you that only google can see.
https://plus.google.com/settings/exportdata. If you don't have an account, that is where you can download your profile, contacts, circles, pictures, and stream content in open formats for use with any (or no) service.
It is better to never have tried anything than to have tried something and failed. - motto of jerks, weenies and losers everywhere